Steam locomotive



July 10, 1928.

c. E. BROOKS ET AL STEAM LOCOMOTIYE Filed A ril 15, 1 923 v 2 Sheets -Sheet 'INV'ENTORIS ATTORNEY:

; 620/ I alarm/2 July 10, 1928. 1,676,247

C. E. BROOKS ET AL STEAM LOCOMOTIVE Filed April 15, 1925 2 Sheets-Sheet 2 x Car/er f. Erna/fir LINVENTORS ATTORNEY.

Patented July 10, 1928.

' U11 E s E crmBLns E. instooxs, or MONTREAL, CANADA, AND cam. A.

DT, 01 GREAT NECK, NEW YORK; SAID BRANDT. ASSIGNOE TO THE SUPERATER COMPANY,

OF NEW YOERK, N. Y.

Application men April 13, 1923;" Serial nasal.

p *Our invention relates to locomotives, and more particularly to throttles for controlling the admission of stealnto the valve chests. It has particular application to locomotives using superheated steam, but its use is not limited in this respect.

. The invention is illustrated in the accompanyin drawings,-where Fig. '1 is a side view 01 a locomotive equipped with our invention; and Fig. 2 is a frontview ofthe,

same locomotive the right half being partly in section on a plane through the steam-pipe, the steam pipe being shown in \full and its covering from the smoke-box to the steam 16 chest being omitted. In both figures some of the parts, having no bearing on the invention, have been omitted.

. The locomotive in connection with which we show our invention 18 of a usual type.

2 Steam generated in the boiler is carried by the dry-pi e 1 to the superheater header 2, leaves this ieader to flow through the superheater elements 3, lying in the flues', and returns in a superheated condition to the 2 header. All this is in accordance with ordinary and well-known practice.

In locomotives as arranged hitherto, it has been the 'common practice to .place the throttle controlling the steam flow in the steam dome where the steam generated in the boiler collects and enters the drypipe.

We are aware that it has. been proposed heretofore to place the throttle or throttles between the superheater header and the 'steanFche sts; and the advantages of this location for the throttle are well understood. None of the arrangements proposed, owever, have been practical or gone into use; and it is the pbject of this invention to provide an improved arrangement of this kind .which is practical and eliminates the objections which obtained in others.-

To this end we emplotwo throttles, placing one ad'acent to-eac steam chest. One of these appears at 5, Fig. 2, while the other lies in the part of the casing shown at 5 in Fig. 1. Steam is supplied to valve 5 by steam pipe 6 leadin from the header- 2. It will be understood t at a corresponding pipe 50 (not shown) carries steam from the header to the throttle on the other side, in casing 5. The throttles may be of any type-desired, but are preferably balanced, double-seated.

STE LOCOMOTIVE.

As their construction plays no part in the invention it is unnecessary toillustrate it.

The two throttles are'operated in unison from the cab by the lever 7. The rod 8 extends .forward from this lever and is connected at its forward end to the arm 9. This arm is secured to the rod 10 and rotates it in the trunnions 11-11. A ring 12 is se-' cured to the rod 10 adjacent to the outside of. the farther trunnion to keep the rod in place. Also secured to the rod 10 are two arms 13, 13 from which extend downward the two rods 14, 14. The lower ends of these rods are pivotally connected to the levers 15-15. Each lever 15 as will be more clearly seen in Fig. 1, has its farther end pivoted at 16 in the fixed bracket 17, and has an op 18 through the links 19 and yoke 2Q. For the sake of clearness'the levers 15 are shown in section in Fig. 2,'the brackets 17 also bem omitted, so that the construction of the yo cs 20 might be visible.

Bythe arrangement described, the desirable object is obtained of having the throttles each in immediate proximity'to its valve chest, which we consider a very iniortant feature of the invention. By. having them so placed the volume of steam beerative connection with throttle stem tween the throttles and the cylinders, after.

the pistons without the necessity of first fill ing up any large spaces. The action of the I locomotive is thus materially improved.

The reduction of the volume of steam between the throttle and the engine has the further great advantage that it minimizes the slipping of the 'drive rs- When slipping occurs, the engineer promptly shuts off the steam supply by'closing the throttle, but the steam trapped between the throttle and engine will continue to actuate the engine and prolong the slipping of the drivers L until its pressure has fallen to a point where it is insufficient to drive the piston. By cutting down to a minimum the volume trapped, the .promptness with which the slipping is stopped is correspondingly increased.

What we claim is: 1 v

-, 1. In a locomlitive, the combination of a pair of flue sheets, flues connecting them, a

' smoke-box into which the flues o n at one end a bi-chambered superheater eader exten g) across the upper. portion of the smokeox ad'acent tot e flue sheet, tubular superheater e ements extending into the flues and having their ends respectively secured to the two header chambers, a dry-pipe connecting. one of the chambers to the boiler steam space, a pair of main distribution valve chests, a throttle adjacent to each outside of the smoke-box, and arranged and adapted normally to control and regulate the steam supply to it, a steam pipe fromthe second header chamber to each throttle, and mechanism to actuate said throttles from the cab. 1 Y

2. In a locomotive the combination of a boiler provided with flues, a superheater comprising elements lying in the flues and ".a header in the smoke-box to which the elements are secured, a dry pipe to carry steamfrom the boiler to the header, a pair of main distribution valve chests, a throttle adjacent to each valve chest and arran ed and adapt-4 ed normally, to control an regulate the steam sup 1y to it, a pipe from the header to each 0 the throttles, and mechanism to actuate said throttles simultaneously from the cab. v v

3. In a locomotive equipped. with a superheater the combination of the usual two main distribution valve chests, a throttle adjacent to each of them and arranged and adapted normally to control and regulate the steam supply to it, two pipes each connecting the superheater to one of the throttles, and mechanism to operate said throttles simultaneously from ,Qle cab.

4. In a. locomotive,'the combination of the usual two main distribution valve chests, a throttle adjacent to each of them and arranged and adapted normally to control and regulate the steam supply to it, two pipes sup lying steam from the boiler-steam space to the two throttles, and mechanlsm to operate said throttles simultaneously from the cab.

c. E'. BRboKs. cam, A. BRANDT. 

